Method and apparatus for manufacturing cups having a lip

Details Method and apparatus for manufacturing cups having a lip Method and apparatus for manufacturing cups having a lip

1983-08-26

1985-08-13

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264285, 264295, 264296, 264339, 264DIG4, 425383, 425385, 425398, 425817R, B29D 2700

Patent

active

045349274

ABSTRACT:
A method and apparatus for manufacturing a cup formed of a thermoplastic resin foamed sheet material and having a lip, the side wall and bottom of the cup being integrally formed, the lip extending outwardly from the mouth portion of the cup and being bent at its end radially inwardly towards the side wall. The method includes forming a rim extending outward from the mouth portion of the cup and having a downwardly extending end, providing a bending furrow on the outer periphery of the side wall at a level below the rim, and bending the rim, as it is heated, at the bending furrow. The apparatus comprises a mandrel block adapted to hold cups and rotatable and axially slidable, a hot blade or cutting blade movable toward the mandrel block and adapted to form a bending furrow for bending the rim, and a lip forming tool having a lip forming groove adapted to be heated.

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patent: 3222437 (1965-12-01), Schilling
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patent: 4150086 (1979-04-01), Stenhall
patent: 4281979 (1981-08-01), Doherty et al.

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